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<head>
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="index.css">
</head>

<body>
    <p></p>
    <ul id="app">

    </ul>
    <button>重新开始</button>
</body>
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</html>